24
RT-SVX46G-EN
Installation
Foundation
Horizontal Units
If the unit is installed at ground level, elevate it above the
snow line. Provide concrete footings at each support
location with a “full perimeter” support structure or a slab
foundation for support. For the unit’s operating and point
loading weights when constructing a footing foundation.
If anchoring is required, anchor the unit to the slab using
hold down bolts or isolators. Isolators should be installed
to minimize the transmission of vibrations into the
building.
For rooftop applications, ensure the roof is strong enough
to support the combined unit and support structural
weight. If anchoring is required, anchor the unit to the roof
with hold-down bolts or isolators.
Check with a roofing contractor for proper waterproofing
procedures.
Ductwork
Supply and return air openings as viewed from the rear of
the unit are shown in the following drawings.
Supply and return air openings as viewed from a
downflow configuration are shown in the following
drawings.
Elbows with turning vanes or splitters are recommended
to minimize air noise due to turbulence and to reduce
static pressure.
When attaching the ductwork to the unit, provide a water
tight flexible connector at the unit to prevent operating
sounds from transmitting through the ductwork.
All outdoor ductwork between the unit and the structure
should be weather proofed after installation is completed.
WARNING
Risk of Roof Collapsing!
Failure to ensure proper structural roof support could
cause the roof to collapse, which could result in death
or serious injury and property damage. Confirm with a
structural engineer that the roof structure is strong
enough to support the combined weight of the
roofcurb and the unit. Refer to the weights section for
typical unit and curb weights.
Figure 38. 3 tons ultra high efficiency - horizontal
supply and return air openings
3 3/16”
81 MM
23 14”
591 MM
4 3/4”
121 MM
RETURN
SUPPLY
14 3/4”
375 MM
17 1/4”
438 MM
8 7/8”
225 MM
13 1/4”
337 MM
3/4-14 NPT DIA. HOLE
CONDENSATE DRAIN
Figure 39. 4, 5 tons ultra high efficiency - horizontal
supply and return air openings
Figure 40. 6 to 10 tons ultra high efficiency - horizontal
airflow supply and return air openings
4 1/4”
108 MM
3/4-14 NPT DIA. HOLE
CONDENSATE DRAIN
SUPPLY
19 1/4”
489 MM
23 7/8”
606 MM
16 3/4”
425 MM
27 5/8”
701 MM
32 1/4”
832 MM
4 3/4”
120 MM
3 7/8”
98 MM
9 3/8”
238 MM
4 1/4”
108 MM
32 1/4”
832 MM
19 1/4”
489 MM
SUPPLY
RETURN
16 3/4”
425 MM
9 3/8”
238 MM
32 1/4”
832 MM
4 3/4”
120 MM
27 5/8”
701 MM
3/4 - 14 NPT DIA. HOLE
CONDENSATE DRAIN
3 7/8”
98 MM
